WO2008123366A1 - はがれの発生が無く表面性状及びバーリング性に優れる高強度熱延鋼板及びその製造方法 - Google Patents

はがれの発生が無く表面性状及びバーリング性に優れる高強度熱延鋼板及びその製造方法 Download PDF

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WO2008123366A1
WO2008123366A1 PCT/JP2008/055913 JP2008055913W WO2008123366A1 WO 2008123366 A1 WO2008123366 A1 WO 2008123366A1 JP 2008055913 W JP2008055913 W JP 2008055913W WO 2008123366 A1 WO2008123366 A1 WO 2008123366A1
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steel sheet
hot rolled
rolled steel
less
temperature
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English (en)
French (fr)
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Tatsuo Yokoi
Kazuya Ootsuka
Yukiko Yamaguchi
Tetsuya Yamada
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Nippon Steel Corp
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Nippon Steel Corp
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Priority to JP2008520155A priority Critical patent/JP4874333B2/ja
Priority to PL08739042T priority patent/PL2130938T3/pl
Priority to BRPI0809301-6A priority patent/BRPI0809301B1/pt
Priority to CN2008800097762A priority patent/CN101646794B/zh
Priority to EP08739042.3A priority patent/EP2130938B1/en
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to CA2681748A priority patent/CA2681748C/en
Priority to US12/532,782 priority patent/US8157933B2/en
Priority to KR1020097019867A priority patent/KR101142620B1/ko
Priority to ES08739042.3T priority patent/ES2678443T3/es
Publication of WO2008123366A1 publication Critical patent/WO2008123366A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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    • C21D6/005—Heat treatment of ferrous alloys containing Mn
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    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
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    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C—CHEMISTRY; METALLURGY
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    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
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    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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    • C21D8/04—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing
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    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
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    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
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    • C21D8/0442—Flattening; Dressing; Flexing
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    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing
    • C21D8/0447—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing characterised by the heat treatment
    • C21D8/0463—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing characterised by the heat treatment following hot rolling
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    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
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    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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    • C22C38/00—Ferrous alloys, e.g. steel alloys
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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    • C—CHEMISTRY; METALLURGY
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    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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  • Heat Treatment Of Sheet Steel (AREA)
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Abstract

　この熱延鋼板は、質量％で、Ｃ：０．０１～０．１％、Ｓｉ：０．０１～０．１％、Ｍｎ：０．１～３％、Ｐ：０．１％以下、Ｓ：０．０３％以下、Ａｌ：０．００１～１％、Ｎ：０．０１％以下、Ｎｂ：０．００５～０．０８％、Ｔｉ：０．００１～０．２％を含有し、残部がＦｅ及び不可避的不純物からなり、式［Ｎｂ］×［Ｃ］≦４．３４×１０－３を満たし、固溶Ｃの粒界個数密度が１個／ｎｍ２以上４．５個／ｎｍ２以下であり、鋼板中の粒界に析出しているセメンタイト粒径が１μｍ以下である。この熱延鋼板の製造方法は、前記熱延鋼板の成分を有する鋼片を、温度ＳＲＴｍｉｎ（°C）以上１１７０°C以下に加熱し、粗圧延を終了温度１０８０°C以上１１５０°C以下の条件で行い、その後３０秒以上、１５０秒以内に仕上げ圧延を１０００°C以上１０８０°C未満で開始し、最終パスの圧下率が３％以上１５％以下となるように、Ａｒ３変態点温度以上９５０°C以下の温度域で仕上げ圧延を終了し、１５°C／ｓｅｃ超の冷却速度で、冷却開始から４５０°C以上５５０°C以下の温度域まで冷却し、巻き取る。
PCT/JP2008/055913 2007-03-27 2008-03-27 はがれの発生が無く表面性状及びバーリング性に優れる高強度熱延鋼板及びその製造方法 Ceased WO2008123366A1 (ja)

Priority Applications (9)

Application Number Priority Date Filing Date Title
ES08739042.3T ES2678443T3 (es) 2007-03-27 2008-03-27 Chapa de acero laminada en caliente de alta resistencia que está libre de desconchado y es excelente en propiedades de superficie y desbarbado y procedimiento para fabricar la misma
PL08739042T PL2130938T3 (pl) 2007-03-27 2008-03-27 Blacha stalowa o dużej wytrzymałości walcowana na gorąco o doskonałych właściwościach powierzchniowych i właściwościach wywijania obrzeży otworu
BRPI0809301-6A BRPI0809301B1 (pt) 2007-03-27 2008-03-27 Chapa de aço laminada a quente de alta resistência livre de descascamento e método de produção da mesma
CN2008800097762A CN101646794B (zh) 2007-03-27 2008-03-27 不发生剥落且表面性状及扩孔弯边性优异的高强度热轧钢板及其制造方法
EP08739042.3A EP2130938B1 (en) 2007-03-27 2008-03-27 High-strength hot rolled steel sheet being free from peeling and excellent in surface and burring properties and process for manufacturing the same
JP2008520155A JP4874333B2 (ja) 2007-03-27 2008-03-27 はがれの発生が無く表面性状及びバーリング性に優れる高強度熱延鋼板及びその製造方法
CA2681748A CA2681748C (en) 2007-03-27 2008-03-27 High-strength hot rolled steel sheet being free from peeling and excellent in surface properties and burring properties, and method for manufacturing the same
US12/532,782 US8157933B2 (en) 2007-03-27 2008-03-27 High-strength hot rolled steel sheet being free from peeling and excellent in surface properties and burring properties, and method for manufacturing the same
KR1020097019867A KR101142620B1 (ko) 2007-03-27 2008-03-27 박리의 발생이 없어 표면 성상 및 버링성이 우수한 고강도 열연 강판 및 그 제조 방법

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JP2007-082567 2007-03-27
JP2007082567 2007-03-27

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WO2008123366A1 true WO2008123366A1 (ja) 2008-10-16

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